*{
				margin: 0;
				padding: 0;
				list-style: none;
			}
			body{
				background: url(../img/background.png);
				background-size: 100% 730px;
				box-sizing: border-box;
			}
			header{
				width: 100%;
				height: 50px;
				background: #272b37;
			}
			header img{
				width: 120px;
				height: 40px;
				margin-left: 360px;
				margin-top: 5px;
				float: left;
			}
			header ul li{
				float: left;
				color: white;
				font-family: "黑体";
				font-size: 18px;
				text-align: center;
				margin-left: 20px;
				width: 100px;
				line-height: 50px;
			}
			header ul li a{
				float: left;
				color: white;
				font-family: "黑体";
				font-size: 18px;
				text-align: center;
				/*margin-left: 20px;*/
				width: 100px;
				line-height: 50px;
				text-decoration: none;
			}
			header ul li a:hover{
				color: #272b37;
				background: white;
			}
			header ul li:hover{
				color: #272b37;
				background: white;
			}
			#lr{
				float: right;
				margin-right: 350px;
			}
			#lr a{
				float: left;
				line-height: 50px;
				color: white;
				font-family: "黑体";
				font-size: 18px;
				margin-right: 10px;
				text-decoration: none;
			}
			#lr p{
				float: left;
				line-height: 50px;
				color: white;
				font-family: "黑体";
				font-size: 18px;
				margin-right: 10px;
				text-decoration: none;
			}
			#lr a:hover{
				color: yellow;
			}
			#log{
				background: white;
				width: 420px;
				height: 390px;
				border: 1px solid #e2e2e2;
				margin: auto;
				margin-top: 130px;
			}
			#username{
				font-size: 18px;
				width: 260px;
				height: 40px;
				border: none;
				border-radius: 10px;
				margin-top: 40px;
				margin-left: 65px;
				border: 1px solid #e2e2e2;
			}
			#password{
				font-size: 18px;
				width: 260px;
				height: 40px;
				border: none;
				border-radius: 10px;
				margin-top: 30px;
				margin-left: 65px;
				border: 1px solid #e2e2e2;
			}
			#denglu{
				font-size: 18px;
				width: 260px;
				height: 40px;
				border: none;
				border-radius: 10px;
				background: #05505e;
				color: white;
				margin-top: 30px;
				margin-left: 65px;
			}
			#log p{
				color: black;
				/*font-family: "黑体";*/
				font-size: 14px;
				margin-top: 40px;
				margin-left: 65px;
			}
			#logg{
				width: 300px;
				height: 24px;
				margin: auto;
			}
			#logg p{
				color: #272b37;
				font-family: "黑体";
				font-size: 20px;
				float: left;
				margin-top: 20px;
				margin-left: 5px;
			}
			#logg a{
				color: #272b37;
				font-family: "黑体";
				text-decoration: none;
			}
			
			footer p{
				color: black;
				font-size: 12px;
				text-align: center;
				margin-top: 180px;
			}